google play services - Android Activity Recognition - Reconnecting following Disconnection -


with google play services' activity recognition, recommend if service disconnects (which might) should remove client:

http://developer.android.com/training/location/activity-recognition.html

in cases, location services may disconnect activity recognition client before call disconnect(). handle situation, implement ondisconnected(). in method, set request flag indicate request not in progress, , delete client

that's fine, gives no instructions how reconnect [safely]. i'm running foreground service needs maintain activity recognition @ times, following disconnection:

@override     public void ondisconnected() {          mrecognitionenabled = false;         mrequestinprogress = false;         mrecognitionclient = null;          //re-initialise activity recognition if service still running         if (sservicerunning) {                       triggeractivityrecognition();         }     }

i reinstantiate client , reconnect:

private void triggeractivityrecognition() {      if (!mrequestinprogress ) {          mrequestinprogress = true;                   mrecognitionclient = new activityrecognitionclient(this, this, this);         mrecognitionclient.connect();     }     }

but according of bug reports i'm getting, there's exception occurring follows:

java.lang.nullpointerexception @ com.google.android.gms.internal.bh.a(unknown source) @ com.google.android.gms.internal.k.f(unknown source) @ com.google.android.gms.internal.k$e.onserviceconnected(unknown source) @ com.google.android.gms.internal.l.a(unknown source) @ com.google.android.gms.internal.k.connect(unknown source) @ com.google.android.gms.location.activityrecognitionclient.connect(unknown source) @ com.myapp.myservice.triggeractivityrecognition(myservice.java:316) @ com.myapp.myservice.ondisconnected(myservice.java:407) @ com.google.android.gms.internal.k.a(unknown source) @ com.google.android.gms.internal.k$e.onservicedisconnected(unknown source) @ com.google.android.gms.internal.l$a$a.onservicedisconnected(unknown source)

the disconnection occurs results in same stack trace every time.

so if being caused google play services, there can prevent or bug need log android?

this works me:

don't attempt reconnect ondisconnect(), instead nothing in ondisconnect()

public void ondisconnected() {  //do nothing here   }

simply use client before, check if connected

if (!mrecognitionclient.isconnected()) {     // client disconnected, reconnect     mrecognitionclient.connect(); }

the playservices seems reconnect nicely.


Comments

Post a Comment

Popular posts from this blog

c++ - CryptStringToBinary API behavior -

i seeing strange behavior cryptstringtobinary cryptography api. please see below code (config: x64 debug): #include "stdafx.h" #include <windows.h> #include <strsafe.h> #include <iostream> #include <exception> void main() { dword dwskip; dword dwflags; dword dwdatalen; //lpcwstr pszinput = l"jaaaaaecaaadzgaaakqaagdnnl1l56bwgfjdgr3rpxtqqqn6daw3usv2emkjym4t"; //this works fine lpcwstr pszinput = l"mytest"; //doesnt work, api returns false,error code 0x0000000d // determine size of byte array , allocate memory. if(! cryptstringtobinary( pszinput, _tcslen( pszinput ) + 1, crypt_string_base64, null, &dwdatalen, &dwskip, &dwflags ) ) { dword dw = getlasterror(); //0x0000000d: data invalid throw std::exception( "error computing byte length." ); } byte *pbytebyte = null; try { ...
Read more

c++ - Correct method for redrawing a layered window -

i have window created ws_ex_layered window style. drawing onto memory bitmap using gdi+, , using updatelayeredwindow update graphical content of layered window. intend use window main window of application, require redraw frequently. seeing layered windows not receive wm_paint windows message [?] , need come appropriate method re-drawing window. optimisation not essential , it's nice have cake , eat too. therefore, in search of "correct" method use. here thoughts far: i guess it's idea render onto off-screen bitmap before bitblt ing or similar. 60 frames rendered per second should (more than?) enough (but how compare other applications' frame rates?). possible solutions: use settimer send wm_timer message on regular basis. useful because through specifying time-out value, can achieve desired frames per second, without requirement measure duration "frame" takes rendered. would cause input or other lags due frequency , speed of m...
Read more

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more